Tax season turns a CPA firm into a paper-chasing operation. Engagement letters, Form 8879 e-file authorizations, K-1 packages, and year-end organizers all need signatures — usually from clients who happily owe you money but won't sign a form. This guide covers which accounting documents to move to e-signature first, the IRS rules that actually apply, and the workflow that gets returns e-filed faster.

Why paper still wastes hours in accounting and tax preparation

Form 8879 chasing — clients who'll happily owe you money but won't sign the form
Engagement letters that take three weeks to come back signed
Year-end document collection that starts in January and ends in May
K-1 distributions to dozens of partners with no tracking
Client portal logins that nobody can remember during tax week

The documents to digitize first

You don't need to convert everything at once. Start with the ones you send most:

Engagement Letter — send at the start of every relationship; templates per service type
Form 8879 (E-File Signature Authorization) — high-volume in tax season; IRS-compliant e-signing required
Tax Organizer / Information Request — send to clients in December; saves January chasing
Power of Attorney (Form 2848) — specific IRS rules apply but e-signature is now permitted
K-1 Cover Letters — bulk-send to all partners with one click
Bookkeeping / Audit Engagement Agreements — yearly renewals; templating saves hours per client

A workflow that actually works

Here's the pattern teams in accounting and tax preparation settle on after a few weeks:

Set up an engagement letter template for each service line (1040, business tax, bookkeeping, audit).
Use Knowledge-Based Authentication (KBA) for IRS-required documents like Form 8879. Verify your platform supports IRS-compliant identity verification.
Bulk-send year-end organizers in early December.
Auto-reminders during tax season are your friend — clients are not deliberately ignoring you, they just forget.
Save signed documents directly to your document management system.
Track signing status alongside return prep status for a unified view.

The compliance question

The IRS permits e-signatures on Form 8879, Form 2848 (POA), and most other forms — but with specific requirements including Knowledge-Based Authentication for higher-stakes forms. Confirm your e-signature platform meets IRS Publication 1345 requirements for the specific forms you handle. For state returns, individual state rules apply. For non-IRS engagement and business documents, standard ESIGN Act compliance is sufficient.

What this looks like in practice

A small CPA firm dropped their average 'days from prep complete to e-filed' from 11 days to 3 by switching to e-signed 8879s with auto-reminders. They handled 22% more returns the following tax season with the same headcount, just by reclaiming the chase time.

Common mistakes to avoid

Using a plain e-signature on Form 8879. The IRS requires Knowledge-Based Authentication for taxpayer e-signatures on e-file authorizations — confirm your platform meets IRS Publication 1345 before tax season.
Collecting the organizer and the 8879 in separate requests. Bundle a client's tax-season documents into one signing packet so they finish in a single sitting.
Skipping auto-reminders during the March–April crunch. Clients aren't ignoring you; they forget. Automated nudges recover most stalled 8879s.
Keeping signed authorizations in email instead of your document management system, where they stay retrievable for the IRS record-retention window.

Getting started

Don't wait until next January. Pick your highest-volume tax-season document — usually the engagement letter or Form 8879 — and set it up as a reusable template (confirming it meets IRS Publication 1345 identity rules for the 8879). The first week clients start signing, you'll feel the chase time disappear.

Start with a free DottiSign account and template your first document before the next deadline.

E-Signatures for Accountants and CPAs: Tax Season Survival Guide